The post-credits scene for Rick and Morty's Season 8 finale seems to be setting up for the series' next major villain ...

Rick & Morty Season 8 closes with another unpredictable post-credit twist — one that turns the usual Mr. Poopybutthole cameo on its head.

The post-credits scene at the end of Rick and Morty's season 8 finale offers a game-changing twist that could make Mr. Poopybutthole a villain.

Rick Derringer's connection to guitarist and singer Dickey Betts Rick Derringer's signature solo hit, "Rock and Roll Hoochie Koo," was released in 1973.